what does data visualization mean to you?

Write down on paper...

Data Visualization

 

an intersection of many ways of thinking

objectives

See how data viz is at the intersection of many fields

 

Understand why CS is valuable for visualization

 

Look at and critique one set of data in several visual forms

 

Add color and annotations to one of those visualizations

data visualization designer and engineer

Who am I?

what does data visualization mean to Me?

Data visualization is about...

data

Data visualization is about...

data journalism

Data visualization is about...

making discoveries with data

Data visualization is about...

informing choices

Data visualization is about...

life and death

Data visualization is about...

graphic design

Data visualization is about...

interaction design

Data visualization is about...

Data-driven design

Data visualization is about...

Making sense of lots of data

Data visualization is about...

Making sense of lots and  lots of data

Data visualization is about...

relating information and events

Data visualization is about...

storytelling

Data visualization is about...

building with tools

Data visualization is about...

building with math & code

Data visualization is about...

understanding algorithms

Data visualization is about...

drawing with math

Data visualization is about...

visual perception

Data visualization is about...

explanations

Data visualization is about...

simulations

Data visualization is about...

learning about people

Data visualization is about...

being playful

Data visualization is about...

being impactful

Data visualization is about...

changing how we experience data

Data visualization is about...

interpreting statistical methods

Data visualization is about...

asking questions of data

Data visualization is about...

changing our perspective

Data visualization is about...

seeing something familiar in a different context

Data visualization is about...

Beauty

Data visualization is about...

Revealing underlying patterns

number of births

deaths per 1000 births

Data visualization is about...

influencing decisions

Data visualization is ...

Inherently interdisciplinary

and

collaborative

what does data visualization have to do with Computer science?

You don't need code to visualize data

You don't need a computer to visualize data.

Statistical Atlas of the United States - 1870 Census Data

W.E.B Du Bois - "The American Negro" at 1900 Paris Expo

"Redlining" maps - Home Owners Loan Corporation - 1930's

Dear Data Postcard Project - 2015

Drawing/illustration

pen/paper

But, computers are

a useful tool for visualizing data.

They can help us draw.

Drawing/illustration

pen/paper or with tools like Adobe Illustrator, Paper, etc

 

Viz Illustrated with Adobe Illustrator

Data drawing with Fifty-Three's iPad Paper app

Drawing/illustration

pen/paper or with tools like Adobe Illustrator, Paper, etc

 

GUI Charting tools

Spreadsheets like Excel, Google Sheets

Viz tools like Tableau

 

Sample business visualization made in Excel - 2018

Storytelling with Data - chart by Elizabeth  Ricks

Contest entry, created with Tableau Public - 2018

Writing code vastly expands what's possible

Drawing/illustration

pen/paper or with tools like Adobe Illustrator, Paper, etc

 

GUI Charting tools

Spreadsheets like Excel, Google Sheets

Viz tools like Tableau

 

code charting tools

Ggplot2 in R, matplotlib and Seaborn in Python, vega and nvd3 and highcharts in Javascript

 

Code: as part of data analysis

Text

Drawing/illustration

pen/paper or with tools like Adobe Illustrator, Paper, etc

 

GUI Charting tools

Spreadsheets like Excel, Google Sheets

Viz tools like Tableau

 

code charting tools

Ggplot2 in R, matplotlib and Seaborn in Python, vega and nvd3 and highcharts in Javascript

 

Using code to draw with data

D3 in Javascript, pixi.js and three.js in WebGL

Early data visualization created with code

Code: bigger datasets

Code: same viz, different data (now)

Code: same viz, different data (personal)

Code: same viz, different data (as a tool)

Code: animations

Code: to reveal & use time

Code: interactive

Code: interactive

You Draw It - New York Times

Code: can draw with math; make anything you imagine

Write down, then talk with your neighbors...

what does data visualization mean to you Now?

 

How has your answer changed?

Color

&

human perception

Notice anything interesting about this group of numbers? 

Easier question: how many 7's are there? 

It's common to add color to show categories. Maybe this helps? How many 7's do you see? 

Because it's ordered, we might use a color spectrum like this. How many 7's do you see? 

But, maybe this is easier... how many 7's are there? 

What about 3's? 

What about 1's? 

What about all the numbers?

But did you notice that the lower left corner is all 3/4/5?

Pre-attentive Attributes

Visual analysis appears to be functionally divided between an early preattentive level of processing at which simple features are coded spatially in parallel and a later stage at which focused attention is required to conjoin the separate features into coherent objects.

Pre-attentive Attributes

Not just in data viz... 

Business Data Viz example (anonymized)

 

Before: color shows categories of things that might influence job satistifaction

After: color used to emphasize the core story -- what aspects of job satisfaction are most influenced by managers

Using a highlight color: gene lookup tool 

Different Color; Different insights

Unemployment Rate - Aug 2016

Different Color; Different insights

Unemployment Rate - Aug 2016

D3 - Bostock; Adapted by Zan

Being intentional with color: meta genomics project

Being intentional with color: meta genomics project

Critique A visualization

Visual form

What visual attributes encode the data?

 

What does this form help us notice?

FoCus attention

How can we use color, annotations, text, and other elements to help focus the user's attention on what we think is most important?

what's the visual form?

what focuses your attention? 

SF Population 2010

 

age

male

female

Under 5

17,963

17,240

5 to 9

14,466

13,996

10 to 14

13,467

12,832

15 to 19

16,888

17,718

20 to 24

29,269

31,349

25 to 29

44,178

43,978

30 to 34

41,351

38,613

35 to 39

38,264

32,549

40 to 44

34,906

27,963

45 to 49

31,783

25,794

     

 

 

 

 

50 to 54

28,957

25,273

55 to 59

26,777

24,931

60 to 64

22,455

22,433

65 to 69

14,318

15,462

70 to 74

11,274

13,268

75 to 79

9,294

11,545

80 to 84

6,878

10,312

85 and over

5,974

11,517

Go to worksheet

Part 1: Critique each visual form

 

Part 2:

a. Choose one chart.

b. Decide what about the data you want to communicate.

c. Add a title, color, and annotations to the chart that help communicate that aspect of the data.

data viz for Lowell HS

By Zan Armstrong

data viz for Lowell HS

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